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1.
Sappo: A shorter version of the commonly used phrase "What's hapening?"

Other variations:
Sappinin
Sapp
Sapp sapp
Jay: Sappo

Jonny: Sappo laaa
by Hay-Z121 November 15, 2009
 
2.
A term used in New Mexico when playing basketball, referring to a lucky shot as opposed to a basket made due to skill.
You can't play ball the only baskets you make are sappos.
by McLuvin505 May 01, 2008
 
3.
Someone that sucks, someone that is horrible at what they do
The LA Lakers are Sappos. That guy looked like a sappo on that play. Kobe Bryant is a sappo.
by Non-Sappo December 12, 2011